<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>客户端</title>
</head>
<body>
<script type="text/javascript">
    var socket;
    if (window.WebSocket) {

        socket = new WebSocket("ws://localhost:8899/ws");

        socket.onmessage = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + event.data;
        }

        socket.onopen = function () {
            var ta = document.getElementById('responseText');
            ta.value = "连接开启!";
        }

        socket.onclose = function () {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" +"连接关闭"
        }
    } else {
        alert("浏览器不支持Websocket");
    }
    function send(message) {
        if (!window.WebSocket) {
            return;
        }

        if (socket.readyState == WebSocket.OPEN) {
            socket.send(message);
        } else{
            alert("连接尚未开启！ ");
        }
    }
</script>
<form onsubmit="return false;">


    <textarea name = "message" style="width: 400px; height: 200px">



    </textarea>
    <input type="button" value="发送数据" onclick="send(this.form.message.value)">

    <h3>服务器输出</h3>
    <textarea id = "responseText" style="width: 400px; height: 300px"> </textarea>
    <input type="button"  onclick="javascript: document.getElementById('responseText').value = ''" value="请空内容">



</form>
</body>
</html>



